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In the following equation ŷ = 25,000 + 4x with given sales (γ in $500) and marketing (x in dollars), what does the equation imply?

Based on goodness-of-fit measures, which is the preferred model based on the results below:  Model 1Model 2Model 3Standard error of the estimate Se6,498.44195,946.70425,789.4569Coefficient of determination R20.29340.40230.4288Adjusted R20.29020.38900.4187

If the coefficient correlation is computed to be −0.85, this means the relationship between the two variables are _______.

According to the National Retail Federation, the average shopper will spend $1,007.24 during the holiday shopping season. What is the null and alternate hypothesis?

Using the following Boxplot, what is the star to the far right considered? 

In a sample of 23 iPhones, 9 had over 83 apps downloaded. Construct a 90% confidence interval for the population proportion of all iPhones that obtain over 83 apps. Assume z0.05 = 1.645.

Which one of the following is not a characteristic of t distribution?

Based on the following table, what is the sample regression equation?  CoefficientsStandard Errort Statp-valueIntercept10,004.96657,634.33381.3110.1927Cost0.43490.11103.9170.0002Grad178.098969.19402.5740.0114Debt141.4783117.21201.2070.2300

A large retailer is asking each customer at checkout for their zip code. If the zip code is the only recorded variable, what is the type of measurement scale?

Carmen is a professor at a local university. In collecting data on her Introduction to Business course for a year, she wants to calculate the z-score for a student who scores a 91 on the final exam. The mean and the standard deviation scores on the exam are 76 and 5, respectively. Calculate the z-score.